Authors

Document Type

Article

Publication Date

11-2007

Publication Title

Acta Crystallographica Section E

Volume

63

Issue

12

Publisher

IUCr Journals

Abstract

The title D-seco limonoid, named 1,3,7-trideacetylkhivorin (systematic name: 14,15:21,23-diepoxy-1,3,7-trihydroxy-4,4,8-trimethyl-D-homo-24-nor-17-oxochola-20,22-diene-16-one), C26H36O7, was isolated from the stem bark of African mahogany Khaya senegalensis (Meliaceae). The four fused six-membered rings adopt chair, chair, boat and half-chair conformations. The five-membered furan ring is disordered by a 180° rotation about the bond linking it to the pyran ring. The crystal structure is stabilized by strong classical O-HO hydrogen-bond interactions to form a network.

Comments

This article is published open-access through IUCr Journals (http://journals.iucr.org/e/issues/2007/12/00/pk2059/index.html).